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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
timeit is the best way to check execution time of code
I like your comment. Thanks!
you god damn right
Another thing learnt today! :D
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It's good to be aware of performance considerations, but in this case it would almost certainly be premature optimisation (a mistake) to consider it. The actual runtime difference is less than a microsecond.